I was sitting in a car and forgot I had a needle and spool of thread in my lap. It fell down at some point and when I left the car I felt it poke my testicles. It felt just like if I had been poked anywhere else; felt basically like a prick. I examined myself and only noticed a little bit of red skin and a tiny bit of blood on the left testicle (front side).

Ive had that happen to my boob before, heals right up (for me it did, but a testicle isn't exactly a boob). Well, Just watch it if it doesn't seem to get better, see the doctor! I'm just a nurse intern lol